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A http GET request with cookies and referer won't send out?

Posted By:      Posted Date: December 04, 2010    Points: 0   Category :.NET Framework
Two days I've been debuging, but still can't find why I'm in this situation:
My program needs to login to a website, and then get web page which only logined members can get.
First, I GET a login page for initial cookies (asp sessionId);
Then, I send a POST with proper data (to login) and cookies I got in step 1.
Last, I send a GET with the cookies I got in previous step to fetch the page which I really need.

The first and second step works pretty fine, but the last step failed. It Never send out a http GET message (oh, to be honest, sometimes, it sends out). I used HttpLook to make sure this.

here is the trace message:

Making Http Request: url=http://www.akaoyan.com/index_shiti_more.asp?action=&c_id=42&s_id=133&page=1, info==null:True.
System.Net Verbose: 0 : [1772] WebRequest::Create(http://www.akaoyan.com/index_shiti_more.asp?action=&c_id=42&s_id=133&page=1)
System.Net Verbose: 0 : [1772] HttpWebRequest#10722382::HttpWebRequest(http://www.akaoyan.com/index_shiti_more.asp?action=&c_id=42&s_id=133&page=1#-940297018)

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